Calculating-machine.



J. I. HAYNEs. GALGULATING MACHINE. APPLIOATIOF FILED J'ULY14, 1911.

Pantd 0cm-19.14.

8 SHEETS-SHEET 1.

KRW

J. I. HAYNBS.

cA-LcULATINe MACHINE. APPLICATION FILED .IULY 14, 1911.

Patented 06116, 1914.

a sums-SHEET 2.

` 8 SHEETS-SHEET 4.

8 SHEETS-SHEET 5.

J. i'. HAYNBS. CALOULATING MACHINE.

v APPLIUATION FILED JULY 14, 1911. u y K 1,1 12,612.4 ratented oct. 6, 1914n 8 SHEETS-SHEET 6.

J'. I. HAYNES! GALGULATING MACHINE. Arrmoulonnnnn JULY14, 1911.

Patented 0G13. 6,1914.

a slums-SHEET 7 J. I. HAYNES.

GALGULATING MACHINE.

APPLIoATIoN FILED JUL 14, 1911.

Patented Oct. 6, 1914.

8 SHEETS-SHEET 8.

M IIII Il Il ll Il Il II J'VOHN 1.HAYNES, 0F ST. LOUIS,MISSOURI.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Oct. (i, 1914.

Application med July i4, 191i. sriai No. 638,533.

To all whom it mjag/ concern,

Be it known that'I, JOHN I. HAYNES, a citizen ofthe UnitedStates, residing at.\St. Louis, Miouri, have invented a certa-in new and useful Improvement in Calculating-Machines, of which the following is a full, clear, and exact description, such as will en-y able others skilled in the art to which it appertains to make and use the saine.

This invention relates to calculating machines, and particularly to that class of calculating machines in which the position 'of the type-bars .is determined' by means of stops or pins that are set up or moved into operative position by the depression of the key levers of the machine.

One object of my invention is to provide a 'calculating machine of the `type referred to that comprises fewer parts than the .calculating machines whichhave heretofore been in. general use.

Another object is to provide a calculating machine in which the key levers have rigid arms that act directly upon the pins or sto-ps which limit the movement of tlfhgtype-bars and thus determine the position of the type that are used to form t e vnumber or numbers which are to be printed. Another object is toprcvide a calculating machine which is so constructed that the operator can see what number-has been set up in the machine prior to the printing operation, thereby enabling the operator to print the number if it is correct or restore the type-bars to'normal position if the number is incorrect. 1

Another object is to provide a calculating machine in which the printing` of a number of zeros is effected by merely depressing one of a group of keys and operating the handle of the machine', thereby overcoming the necessity of depressing one key a number of times whenever it is desired to print a number of zeros. g

Another object is to provide a machine of the type referred to that comprises means of novel construction for preventing the operation of those type-bars which are not used during the printing of a number.

Another object is to provide a printing mechanism of.novel construction that com-.f

v prises only a few parts which can be manufactured and assembled cheaply. And still Aanother object is to provide an accumulator tured at a low cost and which is so designed that 1t is not liable toget out of order easily. Other lobjects and 4desirable features of my inventionwill be hereinafter pointed out. Figure 1 'of the drawings is a vertical sectlonal view of a calculating machine constructed in accordance with my invention; F ig. is a top plan view, the casing of the machine being removed so as to more clearly illustrate the construction of the various elc- Inents of the machine; Fig. 3 is a rear elevational viewg'Fig. 4 is a vertical sectional view'taken on approximately the line 4 4 of Fig. 3; Fig..5 isa top plan view illustrating the construction and arrangement of the key-levers;-Fig. 6 is 'a front elevational view of thei'pin carriage; Fig. 7 is a detail horizontal sectional view taken on the line 7 -7 of Fig. 6, looking in the direction indicated by the arrow; Fig. 8 is a vertical sectional view taken on the line 848 of Fig. 6;-F ig. 9 is a side elevational view of one of tlieeamsl that forms part of the printing mechanism;v Fig. 10 is an edge view of said cam; Fig. 11 is a side elevational view of one of the adding wheels of'the accumulator;

Fig. 12 is an edge view -of said wheel; Fig.

lines14-14, 15-,15, and 16-16, respec-l tively, of Fig. 13, looking in the direction indicated by the arrows; Fig. 17 is a rear elevational view of the artsshown in Fig. 13; Fig. 18 is a sectionaijview of the mechanism that restores the pin carriage to normal position; Figs. 19 and 20 are horizontal sectional viewsptaken on the lines 19-19 and 20-20, respectively, of Fig. 18, look-ing in the direction indicated bythe arrows in Fig. 18; Fig. 21 is a side elevational view of part of the'mechanism illustrated in F ig. 18; and F ig.v 22 is a horizontal sectional view taken on the line 22;22 of Fig. 18,

looking in the direction indicated by theA ing machine consists of 'a plurality of type bars preferably'arranged in a vertical position and provided with plungers that carry type numerals. A set of digit keys are employed for setting up pins that coperate with shoulders on the type-bars to limit the upward movement of said bars and thus vdetermine the position of the type thereon. Said pins are mounted in a transversely moving pin carriage, and a separate set of keys, which I will hereinafter refer to as zero keys, are employed for 'controlling the movement of the pin carriage transversely of the machine so as to permit saidpin carriage to move different distances according to which vzero ke is depressed, thereby permitting a plurality of Izeros to be set up by the depression of a single key. A printing mechanism of novel construction cooperates with the plungers o n the type-bars to force the type into engage-l ment with the paper on the platen of the machine, and the machine is also provided with an accumulator of novel construction for registering and adding th'e numrbers that have been set up so as to permit a total or sub-total to be printed. The transverse movement of the pin carriage in one direction is governed by an escapement mechanism controlled by the key levers of the machine, and the movement of said pin carriage in the opposite direction is effected by means of a spring which is wound up or Vplaced under tension during the forward stroke of the operating handle of the machine. A similar spring is used in the accumulator for actuating a shaft provided with cams that coperate with the pawls which feed the adding vwheels of the accumulator forwardly,l which spring is also wound-up or placed under tension on 'the '35 forward stroke of the operating handle.

The mechanisms which wind up these springs, and also themechanism which imparts movement to the hammers of the printing-mechanism are controlled and acl40 tuated by a reciprocating frame which I will hereinafter refer to as a rack frame, and which is operatively connected to the main operating shaft of the machine which carries the usual operating handle.

Referring to thel drawlngs which illustrate 'the preferred form of my'invention, 1 designates the base plate of the machine which is provided with. brackets and standards for carrying the various elements of the machine that are located. inside vof .the

casing. The paper on which the printing type operate is fed under a platen 3 arranged transversely across the top' of the machine as shown in broken lines 1n Fig. 1,

the paper-feeding mechanism being omitted from the drawings as' it forms no part of myrpresent invention.v

Type-bars.-A set of vertically disposed type-bars A, which are arranged in front 60 vof they platen 3, are providedv with movable type plungers that' coperate with a printing mechanism hereinafter described. Said type-bars are duplicates of one another, and each type-bar has tenl spring-.pressed type plungers/1 whicl: carry type that represent seventh, eighth -and ninth horizontal rows 130 Lirama the numerals 0, 1, 2, 3, 4, 5, 6, 78 and 9, the e being arranged at the upper. ends of the type-bars, the numeral 1 type below the 0 type, the numeral 2 type below the l type, and so lon, thus forming ten horizontal rows of type, as shown in Fig. 3. Any suitable means may be employed for guiding the type-bars such, for example, as transversely arranged rods 5 that pass through vertically disposed slots 6 formed in -75 the type-bars, as shown in Fig. 4. The machine herein shown is provided with twelve type-bars but it is immaterial so far as my invention is concerned how many type-bars are used in the machine.

ontrolling devices for @petrus- Ten digit keys 7 which are arranged in two horizontal banks at the front of the machine are employed for operating pins or devices that limit the upward movement of the type-bars A and thus determinev the position of the type on said bars with relation to the platen 3 on which the type operate. The typebar-controlling devices of the machine herein shown, consist of sets of pins 8 mounted 90 in a pin carriage B that moves transversely of the machine Soas t0bring the different rows ofpins on said carriage into alinement with' the type-bars. The pin carriage B isv arranged at the rear of the type-bars, as .95 shown in Figs. 1 and 4,' and it is preferably channel-shape in cross section and provided with top and bottom guides 9 that embrace a pair of 'horizontally arranged tracks 10 which extendtransversely of the machine. The pins .8 are arranged in vertical rows,

each of which comprises eleven pins, and

the numbenof vertical rows of pins on the carriage B `corresponds .to the number of type-bars so that in the construction herein shown ,the pin carriage is provided with twelve vertical rows of pins 8. Each digit key 7 is carried by a key lever 11 whose rear end is fulcrumed on a horizontally ar. ranged shaft 12 that extends transversely of the machine, and said key levers are provided at their rear ends with vertically disposed arms 13 that are arranged at the rear of the pin carriage, as-shown in Figs. 1 and 3. The arm 13y on the lever which carries the digit key 9 is provided at its upper end wlth a forwardly projecting extension 14 that is varrangedv in alinement with the top .horizontal row of pins on the pin carriage; the arm 13 on the lever which carries the digit key 8 being providedwith an eX- tension 14a arranged in alinement with the second horizontal row of pins on the pin earriage, and the arms 13 on the levers which carry the digit keys 7 6, 5, '4, 3, 2, 1 and Q, 125 being provided with extensions 14", 14, 14d, 14e, 14, 14g, 14l1 vand 14, respectively, that are arranged vin horizontal alinement with the second, third, fourth, fifth, sixth,

l is carried bya key lever 11 of pins on the pin carria e B, as shown clearly in Figs. 1 and 3. 'he space key 7 which is also provided at its rear end 'with an lpwardly projecting, :arm 13 having an extension 14j that is arrangedin. alinement with the bottom horizontal row of pins on the pin carriage. The ,arms '13 on said key levers are so shaped that all of .the extensions previously :described will be in vertical alinement with-.one another, as shown in Fig. 3, so that the first pin set up in the pin carriage will be in the first vertical row of pins, the second pin setup will be in the second vertical row of pins, and so on, as the pin carriage moves transversely to the left ofthe machinelooking from the front ofthe machine. In the preferred form of my invention as herein shown, the arms 13 are rigidly connected to the key levers which carry same so that there will be no lost motion between the digit keys and the devices which move the pins on the pin carriage 4into operative position. Key levers of theiconstruction above described can be manufactured cheaply because they can be stamped out of sheets of metal, and as such' a construction'reduces the number of parts of the machine, the machine can be manu` factured andassembled cheaply and is not as vliable to` get out of order as quickly as a structure in which a number of moving parts are employed for transmitting movement from the keys to the pins inthe pin carriage. The digit keys are-,elevated or restored to, normal position by means of coiled springs 15 connected to the arms 13 of the key levers and to a stationary bracket 16 on the frame of the machine, as shown The pins 8 are preferably loosely mounted in a block or member on the pm carriage B.

so that when the extensions on the arms 13 of the key levers strike the rear ends of the pins the pins will be projected or moved forwardly beyond the lfront face of the pin carriage. The function of said pins, of course,- is to limit the upward movement of the typebars A and thus determine the position of the type on said bars with relation to the platen and the printing mechanism hereinafter described that forces the type plun- -gers 4f rearwardly or toward the platen.

ing the type-bars A consists of a plurality of type-bar-actuating members 18 oscillatingly mounted on a horizontal shaft 19 and provided at their rearv ends with toothed segments 2O which coperate with racks 21 `vided for each type-bar.

- opening 24 in the casing of the machine at chine, to be exposed to View formed on the; front edges of the type-bars A adjacent the, lower ends of said bars, as Shown in Fig. 4, a member 18 beingpro- I also prefer to provide the type-bar-actuating members 18 with segmental-shaped portions 22 that have numerals 23 on lthe front' edges of same that correspond to the ty e numerals on the typebars and which can e seen through a sight a certaln period in thecycle of operations of the machine. The type-bar-actuating members 18 are so proportioned and ar-` ranged that the segmental-shaped portions 22 thereof which carry the numerals 23, willv move relatively the same distance as the type-bars, thereby causing the numerals 23 on the members 18 which correspond to the numbers that have been set up in the mathrough thel sight opening 24 in the casing of the machine. The type-bar-actuating menlbers 18 are rocked in a direction to impart upward movement to the type-bars by means of coiled springs 25 secured to said members and to a stationary part 26 on the frame of the machine, as shown in Fig. 4, and said members are rocked in the opposite direction so as to lower the type-bars by means of a transversely arranged bar 27 arranged un- 95 der the members 18 and carried by a pair of arms 28 loosely mounted on the main operating shaft C of the machine and provided at their lower ends with downwardly projectingextensions 29 to which coiled ten- 100 sion springs 30 are connected, as shown in' Fig. 4, said springs tending to rock theA arms .n

28 upwardly. The main operatingvshaft C is provided at one end with the usual operating handle C', and when said handle ist-105 pulled forwardly a pair of arms 31, which are rigidly secured to the main operating shaft C, engage lugs 28*l on the arms 28 and move said arms downwardly, thereby -permitting the springs 25 to move the type-bar- 11'0 actuating members 18 in the direction that causes the type-bars to move upwardly. vVhen the operating handle C is released, a coiled spring 32, which is connected at one end to an arm 33 on the main operating 115 shaft C and at its opposite end to a stationary bracket 34, as shown in Fig. 1, causes theoperating handle and shaft C to move in the reverse direction back to normal position and thus permits the spring 30 shownv in 120 Fig. 4, to restore the arms 28 which carry the rod 27 that bears against the under sides of .the type-bar-actuating members 18, the

springs 30 being enough stronger than the A springs 25 to overcome the force of the 125 springs 25 and to cause the members 18 to move the type-bars A downwardly before the operating handle of the machine is completely restored to normal position. By providing a separate spring-actuated member 18 130 for each type-bar, each type-bar can be arrested at any point in its upward movement Without affect-ing the other type-bars, and by providing a means separate and distinct from the main operating shaft of the machine for actuating the type-bar-operating members 18 I am able to use the latter portion of the return stroke of the operating handle for setting in operation certain mechanism that does not operate until after the type-bars have been lowered or restored to normal position. i

Escapenwnt mechanism for pin. carrz'age.'-The means herein shown for moving the pin carriage B to the left, as viewed from the, front of the machine, consists of a coiled spring 35 connected to said carriage and to a stationary bracket on the frame of the machine, as shown in Fig. 3, and a'n' escapement mechanism is provided for permitting the carriage to move in this direction step-by-step Iso as to successively bring the vertical rows of pins on the pin l carriage into alinei'nent with the type-bars.

The escapement mechanism is controlled by the key levers of the machine, and it consists'of an escapement shaft 36, a pinion 37 on said shaft that meshes with a rack 38 on the lower edge of the pin `carriage B, as shown in F ig. 4, an escapement wheel 39 on the escapement shaft, and a rock arm 40 provided with a rigid tooth 40a and a spring tooth 40b that eoperate with the escapement wheel 39. The arm 40 is secured to a rock shaft 41 provided with a downwardly projecting pair of arms 42 that carry a rod 43 which extends transverselyof'the machine under the digit key and space key levers 11. When the. space key or either of the digit keys is depressed the arm 40 will move downwardly and thus bring the rigid tooth 40a thereon into engagement with the escapement wheel 39 and simultaneously carry the spring tooth 40b out of engagement with said escapement wheel, said spring ftooth springing laterally as soonas it is released so that it can engage another tooth of the escapement wheel when the arm 40 moves upwardly. On releasing the key that has been depressed the arm 40 moves upwardly, thereby carrying the rigidA tooth thereon out of engagement with the escapement wheel and thus temporarily releasing the escapement shaft so that the spring 35 can move the pin carriage B one step to the left, the movement of the escapement shaft and pin carriage being arrested as soon as the spring tooth 40b on the arm 40 has been compressed or moved into engagement with `therigid tooth 40a on said arm. The pin carriage is moved to the right or restored to normal position by mechanism which will be hereJ.

inafter described.

Stop-plate for idle type-barsf-h view of the fact that the type-bars lmesh Lirama `at all times with the toothed segments 2O on the type-bar-operating members 18 which are free to oscillate whenever the operat` ing handle of the machine is pulled forwardly, some means must be provided for preventing upward movement of those typebars .which are not used during the printing of a number. For example, if the number to be printed is 972, onl the three right` hand type-bars, viewed om the front of the machine, will be used, and the other nine type-bars will perform no function duringV 1 this operation. The means herein shown for preventing upward movement of the idle type-bars, or those that are not used during the printing of a number,is of novel construction and consists of a stop plate 44 on the pin carriage B that moves forwardly automatically when the pin carriage reaches a certain position in its travel tothe left and thus acts as a stoplwhich limits the upward movementv of all of the type-bars to the left of the type-bars that are being used to print the number. Said stop plate 44 is slidingly mounted on the lower flange of the pin carriage, as shown in Figs. 6 and 7, and it is -provided with inclined slots 45 through which studs 46 on said lower flange project. A coiled contractile spring 47 which is connected -to the stop plate 44 and to the pin carriage in the manner shown in Fig. 7, tends to move said stop plate tothe right so as to hold said plate in operative position or cause-it to proJect forwardly beyond the front of the pin carriage. The means which retracts the stop plate 44 or moves it rearwardly so that it'does not project beyond the front of the carriage, consists of a lug 48 on the stop plate that enkv gages the stationary lug 49 on the lower track 10 on which the carriage slides just before the carriage reaches the end of its movement to the right or back to normal 'position When the pin carriage is-in -normal position, or at the end of its stroke to the right, the stop plate 44 will'occupy the position shown in Figs. 6 and 7, the spring 47 being under tension at this time. L When said pin carriage starts to move to the left during the operation of setting up the type that form the number to be' printed, `the 'stop plate 44 starts to move forwardly or to project beyond the front face of. the pin carriage on account of the fact that the spring 47 tends to hold the lug 48 on the stop plate in engagement with the stationary lug 49 on the carriage track, and the studs 46 on the carriage which are moving with the carriage, exert sufficient .pres/sure on the edges ofthe incined slots 45 in;l the stop plate to move the stop plate forwardly or beyond the front face of thecarriage. After the pin carriage has moved a` certain distance to the left, say, forexample, twospa'ces, a

-shoulder 50 on the carriage engages the stop plate and thus causes the 4stop plate to move bodily withthe carriage, the stop plate remammg 1n its forward position during the -rest of the stroke of the pin carriage to the left'. When the pin carriage is returned to normal positlon, or moved to the ri ht, the lug 48 on the stop plate strikes the rigid lug '49 before thecarriage reaches its limit of movement to the right and thus causes the stop, plate to 1oe moved rearwardly or into an inoperative position so as not to interfere with the operation of taking a total or a sub-total. y

Printing mechanism-The printin mechanism preferably consists o-fza plura ity of.

pivota-lly mounted hammers 5l arranged in front of the type-bars, as lshownlv in Fig. 4, and-loosely mounted on a` transversely extending shaft 52, said hammers being guided by a comb plate 53V and one hammer being provided for each type-bar. A plurality of bell crank levers 54 are connected by mea-ne of linksA 55 to the lower ends of the hammers 51, as shown in Fig. 4, and a camshaft 56 that is 57 is empoyed for rocking. the bell crank levers 54 so as to force the hammersl 51 ito engagement with the type plungers 4 of the type-bars, said bell crank levers being moved 1n the reverse direction' by means of leafv springs 58, it being, of course. understood that a bell-crank lever is provided for each hammer. If desired, the cam shaft 56 of the printing mechanism can be provided Wlth a single cam l.which operates-,all of the bell crank levers I4 simultaneously, but I prefer to provide the shaft 56 with a plur'ality of separate and distinct cams, one for each bell crank lever 54, which cams are. so'

arranged that the hammers 51 will be operated progressively,

thereby requiring less power te operate the cam shaft 56 than if said shaft were provided with a single cam that operated all of the bell crank levers 54 simultaneously.

Each of the cams 57occupies a different position on the cam 'shaft 56, each cam bein arranged a slight distance in advance o the one at the left of same. Theparlticular construction of these cams and the Way in'which ythey are mounted on the shaft56 isnovel', and is one of' the impor tant features of my machine as it reduces 'Y .necessity the `cost of manufacture and overcomes the of providing ,a cam of special design for each bell crank lever 54. By referrin to Fig. 4 .it willbe seen that the I' cani s aft 56 has a sleeve 59 rigidly secured "thereto teeth. Each of the cams 57 is' connected to which is provided with' twelve a disk 575 provided at its center lwith an .opening fthat corresponds to the Shape of' the sleeve 59, thereby enabling-the disk to be .arranged ina-ny. desired position on the; sleeve 59 sou as to locate the cam 57 on the' 4rovided lwith a plurality of cams y ber of zeros,

sleeve 59 would beI provided with fourteen teeth. The cam shaft 56 is rotated in the .direction indicated by the arrow in Fig. 4

by means of mechanism that coperates with a reciprocating rack frame F which will be hereinafter described, said mechanism consisting of an oscillating `member 60, shown in Fig. l, which is provided with. a toothed segment 61 that meshes with *a pinion 62 loosely mounted on the cam shaft 56 and provided' with a pawl 63 that is adapted to engage a ratchet wheel 64, on the cam shaft and impart rotary movement to said shaft when the oscillating member is moved in one direction. On the rezverse stroke of the oscillating member 60 the pawl 63 will travel idly over the ratchet Wheel 64 and thusv permit the cam shaft to remain at rest.

Mechanism for restoring pins on, pin car- `ringer-'Phe means for restoring the pins Son the pin carriage B, or moving said jpins into an inoperativeposition, consists 'of a comb plate 65 arranged on the rear side of the pin carriage and. provided with slots through which the pins project, as shown in Fig. 3,V each of the pins 8 being provided with a head 8a that the comb plate engages when said -plate is moved rearwardly away from the carriage. The comb plate 65 iscarried by pairs of links 66 that are connected to the top and bottom flanges -of the pin carriage, .as Shown in Figs. 2 and 3, and coiled springs 67 are connected to the comb 'plate and to the^pin carriage, as shown in Fig. 2, seas to normally hold said comb plate in .:inoperative position against therear side/of the carriage. At a certain period in the cycle of operations of the machine the comb plate 65 is movedl rearwardly away from the pin carriage by means of.` a lever 68 that is actuated by a cam 69 on a vertically disposed sprmg' Aoperated shaft- 70 that forms part of the carriage-restorin "mechanism 4and which will be herona ter described the cam 69 rotating in the direction indicated by the arrow in- F ig. 2 sov that when it strikes the front end of the lever 68 the rear end of said lever will move to the left and thus force the comb plate to the left and also rearwardly, said plate 'striking against the heads 8a on `the pins and thus withdrawing them from operative position.

Zero ,heya-*In order that the operator will not have to press one key a number of times whenever it is desired to print a num..

means is provided for permitting the pin carriage to move a number of'spaCeS to the left whenever one'of a 'cerL tain group' of keys is depressed.. Said means is controlled by two banks of keys 71 which t 3o escapenient mechanism 1s connected, 1s prosecured toa pair of bell crank-shaped arms bar to 'normal position, as hereinafter de- .when any of the zero key levers is depressed y ment with the escapement wheel 39 and thus I will hereinafter refer to as zero keys, the machine herein shown having eight zero keys which are numbered 2 to 9, in-V clusive, as shown in Fig. 5.v rihe zero keys 71 are carried by key levers 7 2 which are pivotally mounted intermediate their ends on a horizontal shaft 73, as shown in Figs. l and 4, and each et said key levers is provided adjacent its rearend with an upwardly projecting lug 74C which passes through a slotted guide plate orcomb plate 75 secured toa Stationary part of the frame of the machine. The rear ends of all of the zero key levers pass under a bail 76 77 mounted on a horizontal shaft 7S. A horizontally disposed rack bar 79 which is reciprocatingly mounted in the arms 77, is adapted to engage a pinion 80 on the. escapement shaft 36 whenever any of the zero keys are depressed. Said' rack bar 79 isfprovided on its under side with a stop 81 ,that coperates with the lugs 74 on the Zero key levers, and a coiled expansion spring 82 is mounted on a reduced portion of the rack bar 79 for 'returning said rack scribed. l

The shaft 4l to which the arm 40 of the vided with a pair of arms 83 which carry a rod 84 that extends transversely under the Zero key levers, as shown in Fig. 4, so that thearm 40 of the escapement mechanism will be moved downwardly .tar enough to carryv both ,the rigid tooth and-the yielding tooth on said arm completely out of engagerelease the escapement shaft which" is then 'free to rotate under the influence of the spring 35 which is connected to the pin carriage. Consequently, whenever one of the zero key levers is depressed the pin carriage will jump quickly to theleft until it is arrested by the engagement of the stop 81 on the rack bar 79 with the lug 74 on the depressed zero key lever, it being, of course, understood that the rack-bar 79 moved into engagement with the pinion 80 on the escapement shaft when the zero key lever was depressed. ln view of the fact that the lugs 7 on the zero key levers are arranged at differenta distances from the righthand side of the machine, the pin carriage will move to the left `dierent distances according to which zero key is depressed. lf thenumber .r being printed contains three zeros the operator depresses the zero key marked 3, thereby `causing the escapement mechanism to be thrown out of operation and the yrack bar 79 to be thrown into mesh with the pinion 80` which moves said rack bar to the left until .being move its full stroke to the left while the Zero' lstop plate 86 the stop 8l thereonengages the lug 74: on the lever 72 of the zero key 3. If the number to -l intacta be printed has four zeros the zero key marked 4C is depressed, the key lever which 'carries the zero key i being so arranged with relation to the lever that carries the zero key '3 that the pin carriage will move one space farther to the left before it is arrested by the engagementot the lug 74 on the key lever and the stop on the rack bar 79 than when the zero key 3 is depressed. When the Zero key is' released the escapement mechanism willbe again thrown into operation so as to lock the pin carriage in the position to which it has been moved, the bell-crank-shaped arms which carry the rack bar 79 being rocked .downwardly by means of springs 85 so as to dsengage the rack 79 from the pinion 80 and thus permit said rack to be restored to normal position by means of the cpiled spring 82 which was compressed 4when said rack moved to the left with the pin carriage. The pins in the pin carriage B are not used during the printing of a number that contains a plurality of zeros; or, inother words, the depression of any of the aero keys 7l has no effect on the pins in thepin carriage. Y

rl`he means which controls the position of the type-bars when a plurality of zeros are to be printed side by side, consists of a plate 86 mounted on the front face of the pin can riage B which i will hereinafter refer to as a zero stop plate. Said Zero stop plate is provided on its rear side with horizontally ydisposed ribs A87 that it in guides or grooves 88 formed in the pin carriage B, as shown in i Figs. l and 6, and on the lower edge of said zerostopplateisashoulder89whichcoperates withl a locking plunger-90 that normally prevents the Zero stop plate troni moving transversely with the pin carriage, the machine so designed that the pin carriage can remains at rest. lVhen the locking plunger withdrawn from engagement with the shoulder-89 on the zero stop plate,- said plate will start to move with the pin carriage, and as it .projects a slight distance beyond the front .face of the pin carriage, as shown more clearly inFig. l., the lower edge 910i same l will form a stopthat coperates with the vtype-bars which aline with the lower edge 9iv of the zero stop plate so as to limit the 'upward movement of said type bars. For ex- T the number being printed is ample, if 972,000, the zero stop plate will reina'ii at rest during the first three steps ofthe pin carriage to the left or when the numbers 972 are being set up, but when the zero key -3 depressed the locking plunger 90 will "be 90 is depressed, however, or

be arranged in alinement with the three right-hand type-bars and thus permitting said type-bars to .move upwardly one space so as to bring the zero type thereon into a horizontal 4alinement with the type 9, 7 and 2 on the three type-bars to the left which have been set up by the depression of the digit keys 9, 7 and 2. The locking plunger 90 has its lower end pivotally connected to an arm 92 on a rock shaft 93 that is provided with a bail 94 which extends over the tailends of the zero key lever 72`, as ,shown inl Figs. 1, 4 and 5, so that when any of the zero key levers are depressed the plunger 90w1l] be withdrawn from engagement with the zero stop plate 86 which is then free to move with the pincarriage B. When the pin carriage is moved to the right, back to normal position, the zero stop plate will move with it until said plate strikes the stop 95 on the upper track l0 on which the pin carriage travels and the locking plunger' 90 will kbe moved upwardly into engagement with the zero stop plate by.means of a spring 96 connected tothe bail of the rock shaft 93, as shown in Fig. 1.

AccamuZator.-The accumulator consists of a set of adding wheels 97 loosely mounted `on a transversely arranged shaft 98 journaled 1n a frame 99'wh1ch is secured to a horizontal rock shaft 100 that is arranged at the rear of the type-bars, as shown in Fig. 4, each of said adding wheels coperating with one of the type-bars and bein@r provided with ten teeth that mesh with a rack 101 on its coperating type-bar when the .accumulator frame 99 occupies a certain position.` Each adding wheel is provided. on one side with a lug" 102 4that coperates with a shoulder 103 on a stop pawl 10i which is pivotally mounted on the accumulator frame 99, as shown in Fig. 4.

wheel ofthe' accumulator' except the wheel A stop ,pawl 104 is provided for each adding of highest order, and said vadding wheels and stopl pawls are so arranged that the upper end of 'each stop pawl will be moved rearwardly o nce during eachfeomplete rotation of the adding wheel cwth which it co crates, the stop pawls being vprovided wit `cam projections 105 which the lugs 102 on the' adding wheels engage during the last vstefior movement-of the adding wheel,I or

afterlsaid' vadding Wheell h as traveled nine spaces in anti-clockwise direction. Pawls or dogs 106 which are pivotally connected to the upper ends., of the stop' pawls '104 cooperate withl the' adding wheels to move them forwardly, said dogs being so varranged that ,each dog coperates with the adding wheel to `the'left of the rone that cooperates with :the stop pawl on which the Vdog is pivotally mounted. That is to say, the stop pawl which coperates with the units-wheel of the accumulator is proengage said adding wheels vided`with a dog. or pawl 106 which cooperates with the tens-wheel of the accumulator so that the tens-wheel will be moved 'one step forwardly every time the unitswheel makes one complete revolution. The dogs 100 are held in engagement with their respective adding wheels by means of flat leaf ,springs 107, and each stop pawl is provided at its lower end with an arm or eX- tension 108 which coperates with a spring detent 109 on the accumulator frame, as shown in Fig. 4, that holds the stop pawl in va certain position after it has been operated by the adding wheel which coperat'es with same. When the type-bars move upwardly the accumulator frame which carries the adding wheels, is swung rearwardly 'so that the racks 101 on the type-bars wi'll not on the upward stroke of, the type-bars. On the downward stroke of the type-bars, however, the accumulator frame swings forwardly back to normal position so that the racks 101 on the type-bar will engage'the adding wheels and thus cause the numbers that have been set up in the machine wher-registered in the accumulator. The stop pawls are moved forwardly s o as to cause thegd'ogs 100 thereon to impart forward strokes to the adding wheels by means of cams 110"on a cam shaft 111 that rotates in the direction indicated by the arrow in Fig. 4, one cam being providedfor each stop pawl 104, and each of said stop pawls being provided on its rear edge with a lug 112 that is adapted to be engaged by said cam-.- The cams 1.10 are preferably of the same lconstruction as the cams that are mounted on the shaft 56 of the printing` mechanism previously described, and they are so arrange'dfon the cam shaft 111 that the stop pawlsv Willfbe operated progressively fromvthe lowest "to the highest order; or, in other words, the stop pawl that coperates with the units-wheel is operated'rst, the one -which 4coper'ates with the tens-wheel next,

and so on.- The accumulatrcomprises the usual units-wheel, tens-wheel, hundredswheel, etc., and said Wheels are s'o arranged that they will eoperate with the type-bars which carry the type-that' forms the units, .tens and hundreds, etc. ofthe number being printed, the 4 rui1its"-v\"7heel' 'y coperating with the type-bar-4 at therighthand side of the machine',` the vtens'-wheel fcoperating with the secondftype-barffrm the righthand side of" the machine, eta, yacross the machine. Normally, thelugs 102 on the adding wheels of the, accumulator'rest upon shoulders 103 of the stop pawls, and whenfa number has been set. upV lin ftliefinachine the` adding wheels whichcoperatezwith the type-'bars thaty have been used-ffof.this'operation, will be moved forwardlyifin'anti-clockwise direction so as to move -thelugs 102 'away from their coperating shoulders 103. If the first number that is printed is 972 the hundreds I adding wheel of the accumulator, which cooperates with the third type-bar from the righthand side of the machine, will be moved forwardly nine spaces; Vthe tenswheel, which coperat'es with the second type-bar, will be moved forwardly seven spaces, and the units-wheel, which co' operates with the first type-bar will be moved forwardly two spaces. 1f the next number that is printed is 1 8 the tens-wheel will be moved forwardly one space and the units-wheel will be moved forwardly eight spaces. On the last step of the units-wheel the lug 102 thereon engages the projection 105 on the stop pawl that coperateswith said units-wheel and will thus move said stop pawl rearwardly, thereby causing the dog 106 thereon to move rearwardly one tooth over the tens-wheel with which said dog coperates, the stop pawl being retained in the position to which it has been moved by means of the spring. detent 109 on thewhich carriesthe accumulator frame. This cam 113 is connected to a long sleeve 115 that is loosely mounted on a horizontal shaft 116 which extends transversely of the machine, and said sleeve is provided with a pinion 117 that normally meshes with a rack 118 on the rack frame F previously described said rack frame being reciprocat- -ingly mounted on horizontally arranged tracks or guides 119 located adjacent the righthand side of the machine and extending from the front to the rear of the machine at approximately right angles to the horizontal shaft 116 which supports the sleeve of the cam 113. y

.Primary actuating mechanisme-As the rack sframe F yis the means which imparts movement to the mechanism that operates the'cam shaft56 of the printing mechanism and also to the mechanisms which operate vthe cam shaft 111 of the accumulator mechand the shaft 7 O which forms part of the pin carriage restoring mechanism,

refer to said rack frame F as the primaryV actuator of the machine. Said rack frame F is moved forwardly and backwardly by means of a pair of pinions 120 that mesh with rack teeth 118 and 1183 on therack frame, said pinions 120 being secured' to a horizontal shaft 121 provided with a pinion 122.1of smaller diameter that is arranged between the 'pinions 120, as shown in Figs. 1 and 2. This intermediate pinion 122 meshes with a toothed sector 123 that is rigidly connected to the main operating shaft C of the machine, as shown in Fig. 1 When the operating handle C is pulled forwardly the toothed sector 123, which meshes with t-he pinion 122, will cause the pinions 120 to rotate rearwardly and thus impart aforward stroke to the rack frame F. This movement of the rack frame causes the cam 113 to rotate in the direction indicated by the arrow in Fig. 16 because the pinion 117, carried by the sleeve 115, in mesh with the rack 118 on the rack frame. This movement of the cam 113 causes the arm 114 to swing downwardly and thus rock the accumulator frame rearwardly so that the adding wheelsthereon will not engage the type-bars when said type-bars move upwardly. rThe accumulator frame is held rearwardly, or in an inoperative position, until the forward stroke of the operating handle C is completed, the cam 113 being so designed that it makes one complete revolution during the forward stroke of the operating handle so that the arm 1111 will move back to its original positionon the low partof the cam before the operating handle starts to nieve rearwardly. On the return stroke of the operating liandle, the rack frame F moves rearwardly but the sleeve 115, to which the cam 113 is connected, remains at rest so as to permit the accumulator frame to remain in its operative position and thus cause the adding wheels thereon to be engaged by the racks 101 on the type-bars when said type-bars move downwardly. The means by which 1 accomplish this, namely, cause the cam 113 to rotate on the forward stroke of the operating handle and to remain at rest on the return stroke of the operating handle, consists of a pawl and ratchet connection between the pinion 117 and the sleeve 115 which carries the cam 113, said pinion being provided with a pivotally mounted pawl 124 that engages a one-tooth ratchet wheel 125 rigidly secured to the sleeve 115 when the rack frame moves forwardly, and which slides freely in the reverse directionmover said ratchet wheel when the rack frame moves rearwardly, it being, of course, understood that the pinion 117 is loosely mounted on the sleeve 115. y p

The means which transfers movement from the rack frame F to the `oscillating member 60 of the printing mechanism consists of a short rack bar 126 slidiiigly mounted in a guideway, as shown in Figs. 1 and 2,

and provided .with a laterally projecting lug` 127 that lsadapted to be engaged by a laterally projecting lug 127 a on the rack frame F when said rack frame moves forwardly, the teeth of the rack bar 126 meshing with a toothed segment on the lower end of the oscillating member 60 ot the printing mechanism. The lug 1272L on the rack frame does not engage the lng on the rack bar 126 until just the last part of the forward stroke of the operating handle of the machine so that the printing mechanism does not operate until after the type-bars have been positioned. On the return stroke of the rack frame F the oscillating member 60 and the rack bar 1.26 are restored to normal position by means of a coiled spring 123, shown in Fig. 1, that is connected at one end of the oscillating member 60 and at its opposite end to a stationary part of the frame of themacbine.

The vertically disposed shaft 70 which forms part ot' the mechanism for restoring the pin carriage to normal position, and also for withdrawing the pins or moving vthem rearwardly into an inoperative position, is actuated by means of a clock-spring 12S) secured at ene end to said shaft and at its opposite end to a stationary part of the frame of the machine. said shaft being'rotated inthe opposite direction so as to wind up the spring 12S) by means or" mechanism that cooperates with the rack frame F. In Figs. 1S to 22, inclusive`l I have illus trated the-shaft 70 and the mechanism that is employed -for winding up the spring 129 which actuates said shaft. By referring to said igures it will-be lseen that the rack frame F is provided on one side with a rack bar 130 that meshes with a pinion 131 which is loosely mounted on the shaft. 70.. Said pinion is provided on-its upper side With a lug 132 that copeates with a lug 133 on the under side of a disk 134 which is-pinned to the shaft 70. .ik disk 135 which is'loosely mounted on the shaft 70 and arranged above the disk 134, is provided on its under side with a cam track 133 which receives la spring-actuated" locking dog 137 that is mounted on the-disk ,134, and said disk 135 is also provided on "its upper side with a' toothed segment 138 that meshes with rack teeth 139 on the front face oi. the pin carriage B, said rack teeth 139 being located adjacent the lower righthand edge of the pin carriage/as shown in Figs. 1, 2 and 6. bell-crank-shaped locking dog 140, Which is pivotally mounted on a stationary part 'l of the. frame oli/the machine, coperates with a notch 14:1 on the periphery of the disk 134 to lock said disk, and a cam 142, which is arranged on one-side of the rack frame F, as shown in Figs. 20 and 21, engages said locking dog` on the return Stroke of the rack frame and trips it or moves it into an inoperative position against the' vforce of the spring 143 so as to release the disk 134, raid cam 142 also cooperating. with the spring-actuated locking dog 137 in certain positions of the rack frame F.- The pinion 131 on the shaft 70 is normally held in engagement With a stationary collar 145 on said shaft by means of a coiled expansion spring 146 that exerts downward pressure on said pinion and thus holds it in mesh with the rack 130 o-n the rack trame.

Prior to the setting up of a number and the printing of' saine, the parts just described oceupy the positions shown in Figs. 18 to 217 inclusive. Vhen the digit key levers are depressed so as to cause the -pin carriage i3 to more transversely to the left ot' the machine, the disk which carries the 'cam track 13o will rotate in anti-clockwise direction, looking at Fig. 20, because the toothed segment 13S on said disk meshes with the rack 131) on the pin carriage, said disk coming to rest as soon as the pin carriage stops. It the pin carriage @moved three spaces to the left the disk 135 Will more relatively-the same distance and thus cause the shoulder 13oa of the cam track on the under side ot' said disk to occupy approximately the position indicated by broken lines in Fig. 20. The shaft remains at rest during this operation but when the operating handle C of the machine is pulled forwardly the rack frame F moves forwardly and the rack 130 on said :frame rotates the pinion 131 in anti-clockwise direction, thereby causing the lug 132 on said pinion to engage the lug 133 on' the under side of the disk 134 and rotate said disk and .the shaft 70 to which it is connected, 'the machine being so designed that the disk 13.4 will make one complete revolution on the forward stroke of the rack frame F. The forward movement of the rack frame carries the cam 142 thereon out of engagement with the bell-crank-shaped locking dog 140 and thus permits said dog to move into engageinent with the periphery of the disk 134 so that it will spring into the notch 141 in said disk and thus lock same When the movement ot the disk is completed. Vhen the rack Jtra me F moves rearwardly the cam 142 thereon trips the dog 140 just before the return stroke ot said Irame is completed, thereby releasingr the disk 134 and thus permitting the spring 129 to rotatethe shaft 70. During this movement of the shaft 70 the spring-actuated lockingr dog 137 on the disk 134C engages the shoulder 136a of the cam track on the under side of the disk 135 and thus moves said disk back to normal pos sition` whiohvoperation also restores the pin 'carriage to normal position on account of the tact that the toothed segment 138 on the disk 135 meshes with the rack 139 on the pin .carriage B. The cam 142 on the side of the rack frame F is so arranged that it engages ythe dog 137 on the disk 134 and moves it out of engagement with the shoulder 1361ot' the cam track just before the rack frame completes its rearward stroke so that the disk 135 and the toothed segment 138 thereon `are free to rotate when the pin carriage B again starts to move to the left. The cam G9 on the upper end of the shaft 70 which actuates the comb plate 65 that withdraws the pins on the pin carriage from operative position, is provided on its under side with a spring-actuated pawl 69a that coperates with a one-toothed ratchet 69b on the shaft 70, as shown in Fig. 19, so that the cam 69 will remain at rest when the spring 129 is being wound up and will rotate with the shaft 70 when said shaft is released from the influence of the locking dog 140, as previously described.

The cam shaft 111 that aotuates the stop pawls 104 of the accumulator is operated in a similar manner to the shaft 70 just described by means of a spring 147 which is connected at one end to said shaft and at its other end to a stationary part of the'frame of the machine. 'The rack frame F is provided on its under side with a rack bar 148 which meshes'with a. pinion 149, as shown in Fig.' 1, said pinion being connected to a disk 14.9all loosely mounted on the cam shaft 111 and provided with a lug 150 that coperates with a lug 151 on a disk 152y which is pinned to the cam shaft 111. A spring-actuated locking dog 153, which is pivotally mounted on a vstationary part of the fra-me of the machine, coperates with a notch 154 in the periphery of the disk 152 to lock said disk, and a cam'155, which is arranged on the rack frame F, operates to trip said dog 153 so as to release the disk 152 andthe cam shaft 111. When the rack frame F moves forwardly the pinion 149 will rotate and thus cause the lug 150 to engage the lug 151 i and impart rotary movement to the disk 152 '40 and the cam shaft 111 to which said disk is connected, the machine beingso designed that said disk and shaft make one complete revolution upon the 'forward stroke of the rack frame F. At the end of this complete revolution" the cam shaft 111 is locked by means of the locking pawl 153 which moved into engagement with' the periphery of the disk 152 when the rack frame F moved forwardly. PlThe spring 147 which is connected 'to the cam shaft 111 of the accumulator is now wound up, and when the rackframe` F moves rearwardly and trips the locking pawl 153 said spring will unwind and thus rotate the cam shaft 111 in the direction indicated b the arrow in Fig. 4, the cams 110 on said s aftengaging the stop pawls of the accuvmulator which have been moved intooperative position by the adding wheels of the accumulator, as previously described. At the timethe cam shaft 111 oilthe accumulator is being rotated backwardly to wind up I the spring 147, the frame of the accumulator is in its rearward or inoperative position so that the stop pawls of the accumulator lie out ofthe path of movement of the cams on 'the cam shaft 111 and thus cannot prevent said cam shaft from rotating backwardly in the manner just described.

Total keg/.#111 order that a total may be taken ofthe numbers that have been set up in the machine, the machine is provided with a total key 156 mounted on a key lever that has a cam 157 secured thereto,as shown in Fig. 1.' Said cam cdperates with a disk 158 on the sleeve 115 that carries the cam 113 which causes the accumulator frame to swing rearwardly, and when said total key 156 is depressed the cam 157 engages the disk 158 and moves the sleeve 115 laterally in the direction indicated yby the arrow in Fig. 13, the sleeve 115 being held in normal position by means of -a coiled expansion spring 159 which is also sho-wn in Fig. 13. The cam 157 is so designed thatl the lateral movement imparted to the sleeve 115 carries the pinion 117 onsaid slceve out of engagement with the rack 118 of the rack frame F, as shown in Fig. 17. Consequently, if the operating `handle of the machine .is pulled forwardly' when the total key 156 is depressed, the cam 113, which controls the movement of the accumulato-r frame, will remain at rest on the forward stroke of the rack frame and thus cause the accumulator frameto remain in its normal position so that the racks 101 on the type-bars that have been used in setting up the numbers which are to be totaled, will engage the adding wheels of the accumulator when said type-bars move upwardly and will thus move said adding wheels backwardlyV until the lugs 102 thereon engage the shoulders 103 on the stop pawls of the accumulatori. i If the numbers which have been set up in the machine are 972 and 18, thehundredswheel of the accumulator will rotate rearwardly nine steps before it is arrested by the stop pawl and Ithus permit the third typebar fromA the righthand side of the machine to move upwardly nine spaces, the tenswheel will also rotate rearwardly nine steps before it is .arrested by the stop pawl and thus permit the second type-bar from the righthand side of the machine to move upwardly nine spaces, and the units-wheel will remain at rest and thus permit the first rack bar to' move upwardly one space so as to carryJ the 0 type thereon 'into alinement withthe type numerals 9 "on theother two type-bars. This total 990 is printed in qthe manner previously described, and upon the return stroke of the rack frame F the accumulator frame is moved rearwardly so that the downward movement of the typebars will not disturb the adding wheels of the accumulatorl which Xwere Vmoved back to zero by the .upward movement of the typebars. This rearward movement of the accumulator frame vis eifected by the cam1-13- and arm 114, previous'lydescribcd, through means, of a pinion 117a loosely mounted on the sleeve 115 which carries said cam and the rack 118a on the rack frame F which was engaged-by the pinion 117a `when 'the cam arm 157 moved said sleeve I115 laterally inthe direction indicated by the arrow in Fig. 13. The pinion 1171 is also loosely mounted on the sleeve 115, and it is provided with a spring-actuated pawl 124il that coperates with a one-toothed ratchet 125a rigidly secured to the sleeve 115, said pawl and ratchet being so arranged that the `pawlwill travel idly over the ratchet on the forward stroke of the rack frame F and thus permit the accumulator frame to remain in .operative position on the forward stroke of the operating handle orwhen the type-bars more upwardly. Upon the return stroke of the operating vhandle the pawl 124a picks up the ratchet 125a and moves the sleeve 115 and the cam 113' thereon, thus causing the accumulator frame to move rearwardly so that the adding wheelsl thereon will not be engaged by the racks 101 on the type-bars when said type-bars move downwardly. The dogs 106, which coperate with the adding wheels of the accumulator, are. raised or moved into an -inoperative position when the total-key is depressed so as to permit the adding wheels to rotate rearwardly when they are engaged by the racks on the upward stroke of the-type-bars. The means herein shown for moving the dogs 106 into an inoperative position consists of a transversely extendingrod 160 (F t) arranged under the dogs 106 and carried 'by a pair of arms on a rock shaft 161 which is provided ,Wit-h a depending arm 162, as shown in Figs. 1, 3 and 4. The total-key lever'is provided with an upwardly projecting extension 163 that engages a lug 164 on the arm 162 when the total-key is depressed and thus rocks the shaft 161 so as to cause the rod 160 to .move upwardly'and disengage the dogs 106 from e the adding wheels of the accumulator.

Suo-total keg/. -In order that a sub-total may be taken of someof the numbers in-a column of gures which are to be added, I have provided the machine with a sub-total key 156l which is mounted on a key lever that is provided at its rear end with a cam arm 157'L that coperateswith a disk 158a on thegsleeve 115, said cam arm 157a being so designed that the depression of the subtotal key will cause" the sleeve 115,

previously described, to move laterally in the direction indicated by the arrovsT in Fig. 13, far enough to disengage the pinion 117 from its Vco'l'iciating rack but not far enough to carry the pinion 117a into engagement with its ccperating rack. If the operating liandle is pulled forwardly after the sub-total key has been depressed a total of the numbers which have been previously registered in the accumulator, will he printed and sub- 'sequently re-re'gistered in the accumulator.

and return to normal position without causl ing the cam 113 to operate, thus leaving the accumulator frame in its normal position so that the racks 101'on the type-bars will engage the adding wheels of the accumulatorA on both the upward and downward strokes of said type-bars. On the upward stroke of the type-bars the'adding wheels of the ac3 cumulator are rotated rearwardly. until they are stopped by the stop pawls of the accumulator,'thereby printing the total of the numbers which have been previously registered. After this total has been printed the type- 'iars move downwardlyl and as they engage the adding wheels of the accumulator on the downward stroke they will restore said adding wheels to the position they occupied before the type-bars moved upwardly on the forward stroke of the rack frame. The subtotal key lever is also provided at its rear end with an upwardly projecting extension 16?a similar to that on the total key lever for causing the dogs 106 of the accumulator to be disengaged from the adding wheels' shaft 100 that carries the accumulator frame and move said frame rearwardly or into an inoperative position whenever the error-key is depressed. The depression o the errorkey lever' also causes a stopvarm 168 to be moved upwardly into the path of movement of the rod 27 which forms part of the typebar-operating mechanism, said stop arm 168 being connected to a shaft provided with an arm 169 thatv has a laterally projecting pin 170 which lies under the error-key lever, as shown lin Fig. 1. If the operator thinks that he has made a mistake in setting up a number he depresses the error-key 165 before he pulls the operating handle of the machine forwardly, thereby causing the accumulator to be moved into anpinoperative position so that no numbers will be registered in the accumulator, and also moving the stop arm 168 'into such a position that it prevents the operating handle from being pulled completely forward. The operating handle moves forwardly far enough, however, to permit the number that has been set up to be seen through the sight opening 24 in the casing, but said operating handle cannot be moved forward far enough to cause the printing mechanism to operate. If the number that has been set up is incorrect the operating handle is released so as to restore the parts to normal position and the errorkey is released, but if the number that has been set up is correct the operator merely releases the error-key and continues the forward stroke ofthe operating handle so as to cause the number to be printed. The errorkey, total-key and sub-total-key, and also various other elements of the machine which are actuated positively in one direction, are restored to normal position by means of suitable coiled springs connected thereto. Repeat seyf-A repeat key 171, shown in Fig. 2, is provided for enabling a number that has been set up in. the achine to be printed several times by mere y pulling the operating handle of the machine forwardly several times. Said repeat key is carried by a key lever that is vprovided at its rear end with anv upwardly projecting arm 172 (Eig. 3) having a 'pair of forwardly projecting extensions 173 vwhich lie under the pinion '131 which forms part of the mechanism that winds up thespring 129 which restores the pin carriage to normal position. When the repeat key is depressed the extensions 173 on the arm 172 of said repeat key lever move upwardly and disengage the pinion -131 from its coperating rack 130 on the rack frame F, thereby permitting said rack .frame to ybe moved back and forth without affecting the position of the pin carriage B and consequently causing the number that has been set up at the previous operation to be printed as many times as the operating handle is moved forwardly.

0pera'e'on.-In order that the operation of the machine may be perfectly clear, I will describe the movements of the various parts-of the machine duringthe operation 'of printing the numbers 972,000 and 18,000 and taking the total of these numbers. When the digit key 9 is depressed the extension 14 on the arm 13 of the digit key lever 9 engages the rst pin in the top horlzontal row of pins onthe -pin carriage and forces said pin forwardly so that it projects beyond the front face of the in carriage, the downward movement of the digit key lever 9 arising the escapen'lent mechanism to operate and' thus permit the pin 'carriage to move one step to the left, looking from the front of the machine. The second vertical row of pins on the pin carriage is now in alinement with the extensions on the arms 13 of the key'` levers so that when the digit key 7 is depressed the extension 14b on the arm 13 of said key lever engages the second pin in the third horizontal row of pins fromV the upper edge of the pin carriage, the pin -arriage moving another step "to -the `left when the digit key 7 isreleased. s The digit` key 2 is then depressed so as to cause the extension 14g to engage the third pin in the f ninth horizontal row of pins from the top of the pin carriage and move said pin forl wardly. The number is completed by depressing the zero key 3 which causes the escapemcnt mechanism to be thrown out of operation and the rack bar 7 9 to be thrown into mesh with the pinionSO on the escapement shaft, the pin carriage moving to the left until the stop S1 on the under side of the rack bar 79 engages the lug 74 on the zero key As-the pin carriage started to move to'the left the stop plate 44 started to move forwardly so that said stop plate is now in position to prevent upward movement of all of the type-bars at -the left of the sii; righthand type-bars of the machine which. are to be used in printing the number 972,000. which were moved forwardly by the depres siono f the digit keys, limit the' upward movement of the three lefthand type-bars of the group above-mentioned, andthe zero stop plateu86 onthe in carriage limits the upward movement o the three righthand type-bars of said group, said zero stop plate having moved tothe left'with the carriage after the locking lunger 90 was disengaged from 'said stop p ate by the depression the zero stop key 3. After the number has been -set up in the manner described, the operator pulls the handle C of the machine forwardly, thereby releasing the type-baroperating members 18 and permitting said members to move thevsix righthand typebars upwardly until the shoulders 17 of the three right'handitype-bars engage the lower edge 91 of the Azero stop plate 86, and the shoulders 17 of thel three type-bars to the left engage the pins :that project forwardly from the front face of the pini carriage E. Each of .said three riglithand type-bars moves upwardly one space so as to bring the",0vtype. tl1ereon into operativo position, the fourthtype-bar from the righthand side of the machine moving upwardly two' spaces, the fifth type-bar seven spaces, and the sixth type-bar nine spaces, thus arranging'th'e type numerals 9, 7 2, 0, 0, 0, on the type-bars in horizontal ,.alinement and the corresponding numbers 234 on the portions of the type-bar-operating members in alinement with the sight opening 24 in the casing of themachine. The forward stroke of. the operating handle causes 'the rack frame F to move forwardly, and asl the rack 118 on said framemeshes'. with the inion 117 on the sleeve of tlie cam 113'sai cam will rotate and thus rock the accumulator frame rearwardly so that the addi-ng wheels of the'accumulator will not `be engaged by the type-bars. when saidl bars move upwardly.Y The spring 129,'which coperates with the shaft 70 ofthe pin carriage restoring mechanism, is wound up on the forvwardstroke of the rack frame F,-as is also the spring 147 which coperates with the The pins in the pin carriageV 

